HELP

I have a 1986 jeep cherokee with a 2.5 liter 4 cylylinder, it blew up and I also have a 1989 cherokee with an inline 6 cyl. What do I have to do to put this 6 cyl. In my 1986 that has a 4 cyl. It looks like a major swap but its for my kid and I would pay for the info.I heard you guys really know your stuff and I dont have the time to experiment you know what I mean, thyanks guys, Lance